Vandoren B40 Lyre Bb Clarinet MouthpieceThe perfect blend between a round sound and rich tone color. Easy blowing especially in the upper register. Opening 1 100 mm 117. 5 Facing length Long This series is available with two different beak versions: Traditional and Profile 88 . The difference between Profile 88 and Traditional mouthpieces is in the exterior angle of the beak. Therefore, the musician is free to choose the model which suits his purpose in terms of best playing position,